Results 261 to 270 of about 80,385 (313)
Some of the next articles are maybe not open access.
Partial discharge. III. Cavity-induced PD in solid dielectrics
IEEE Electrical Insulation Magazine, 1990For pt.II see ibid., vol.6, no.5, p.35 et seq. (1990). The question of how to relate the magnitude of the measured, effective, partial discharge (PD) to the size, shape, and position of the cavity within a solid dielectric system is addressed. The causes of cavities are examined, and a brief review of gas breakdown is given. It is then shown that for a
openaire +1 more source
Partial discharge. IV. Commercial PD testing
IEEE Electrical Insulation Magazine, 1991For pt.III see ibid., vol.6, no.6, p.11 et seq. (1990). Commercially available partial discharge (PD) detectors are described, along with their important characteristics. The primary characteristics that detectors have in common and that are used as a basis for classification are the number of inputs used, the bandwidth of the detector, and the method ...
openaire +1 more source
Partial discharge. X. PD in gas-insulated substations-measurement and practical considerations
IEEE Electrical Insulation Magazine, 1992For pt.IX see ibid., vol.7, no.6, p.5 et seq. (1991). An overview of engineering practice related to partial discharge (PD) measurements in gas-insulated substations (GISs) is provided. The following questions are addressed: why measure PD in GIS?; in which phases of the life cycle should PD be measured?; what PD measurements are presently available ...
R. Baumgartner +3 more
openaire +1 more source
Development of automatic identification method for GIS PD (Partial Discharge) defects diagnosis
2007 IEEE Lausanne Power Tech, 2007In this paper, an overview of a new GIS (gas insulated switchgear) PD (partial discharge) diagnostic algorithm for both single-defects and multi-defects in HiPDS-G (Hyundai intelligent preventive diagnostic system for GIS) developed by HHI(Hyundai Heavy Industries Co., Ltd) is given.
Young Chan Choi +4 more
openaire +1 more source
Calibrating the UHF technique of partial discharge detection using a PD simulator
IEEE Transactions on Dielectrics and Electrical Insulation, 1995The paper describes a technique for simulating the presence of partial discharges in gas-insulated substation (GIS) equipment. The technique employs a pulse generator to inject current pulses through a suitable protrusion. The current pulses have similar temporal characteristics to those produced by an actual discharge event, with the added advantage ...
A.G. Sellars, S.J. MacGregor, O. Farish
openaire +1 more source
Fundamental investigations concerning the behaviour of partial discharges (PD) in dielectric liquids
10th International Conference on Conduction and Breakdown in Dielectric Liquids, 2002The authors report the results of fundamental investigations on the behavior of partial discharges (PDs) in insulating fluids. The shape of PD pulses is recorded with a special measuring system and the characteristics of PD pulses and their dependencies in insulating liquids are determined.
H. Borsi, U. Schroder
openaire +1 more source
Partial discharge. XVI. Ultrasonic sensing of PD within large capacitors
IEEE Electrical Insulation Magazine, 1993For pt.XV see ibid., vol.8, no.6, p.37 et seq. (1993). High-voltage capacitor technology is reviewed, and the characteristics of partial discharges (PDs) in these capacitors, the PD's ultrasonic signatures, and the effects of acoustic attenuation within capacitor windings are discussed.
openaire +1 more source
Using Fiber Bragg Grating Sensors for Partial Discharge (PD) Detection on Power Cables
Optica Advanced Photonics Congress 2022, 2022This paper presents the preliminary results of the Fiber Bragg Gratings sensors temperature/strain cross-sensitivity allied to a low sampling rate to distinguish Partial Discharge (PD) events in power cables.
Ricardo Vendruscolo +6 more
openaire +1 more source
Partial discharge. V. PD in polymer-type line insulators
IEEE Electrical Insulation Magazine, 1991For pt.IV see ibid., vol.7, no.1, p.20 (1991). Some of the problems related to corona and partial discharge damage to polymer insulators are outlined. The basic construction of polymer insulators for overhead lines, which consist of a core, weathersheds, and metal end fittings, is described.
openaire +1 more source
Signal extraction methods for online partial discharge (PD) measurement of power transformers
2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2015Wavelet transform-based Partial discharge (PD) signal extraction methods have been widely adopted in the past ten years. However, these methods may still encounter some difficulties in online PD measurements, in which PD signals can be overwhelmed by noise.
Junhyuck Seo, Hui Ma, Tapan Saha
openaire +1 more source